[volt-nuts] VS 330 circuit board oddity

[Mitch Van Ochten]

The module's pins fit into the little gold cups which are soldered to the 
traces.  It is an individual "socket" for each pin.

The Ty-wrap is to insure the module doesn't pop out during shipment.


Regards,

mitch

----- Original Message ----- 
From: "Joseph Gray" <jgray at zianet.com>
To: "Discussion of precise voltage measurement" <volt-nuts at febo.com>
Sent: Friday, August 02, 2013 10:20 PM
Subject: [volt-nuts] VS 330 circuit board oddity


> Of course, before powering up the VS 330, I had to remove the covers and
> take a look inside. Everything looked intact and reasonably clean.
>
> You can tell that someone re-painted the top cover. It is glossy and
> smooth. The bottom cover is matte finish and textured.
>
> I did see one oddity on the circuit board. There is a broken nylon wire 
> tie
> attached to the underside of the main circuit board. You can see it in the
> first picture here:
>
> https://dl.dropboxusercontent.com/u/19599147/VS%20330%20Board%20-%20Bottom.jpg
>
> Here is a picture of the top side. You can see that the holes straddle the
> 801 amplifier module.
>
> https://dl.dropboxusercontent.com/u/19599147/VS%20330%20Board%20-%20Top.jpg
>
> You might think that perhaps the nylon tie was there to hold the amplifier
> module onto the board, but the module's pins are soldered. The way the tie
> is hanging, it looks to me that perhaps something was attached to the
> bottom side of the board, underneath the amplifier module.
>
> I'll have to email Krohn-Hite and request a manual. In the mean time, any
> guesses?
>
> Also, I am normally inclined to replace old electrolytic caps. Opinions on
> whether I should or shouldn't?
>
> Joe Gray
> W5JG
> _______________________________________________
> volt-nuts mailing list -- volt-nuts at febo.com
> To unsubscribe, go to 
> https://www.febo.com/cgi-bin/mailman/listinfo/volt-nuts
> and follow the instructions there.